Need some opinions on buttons

[HighVDI]

Just wondering if anyone could give some insight on a few buttons I found a couple weeks ago. All were found close to one another at an early 1900's house. Also found a buckle at the same location today. Looks old to me, but would be nice to get other opinions!

Thanks!

 

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[Icewing]

The one on the left is a Union General Service Button the others are either just hard to make out by the pics or are just blank flat buttons